The webapp provides for each item the link on ECB's website.
Speeches for : Jose Manuel Gonzalez-Paramo where "theory" appeared
2011-09-19 : Monetary and fiscal policies in times of crisis2009-06-10 : Address for the 2008 Bernácer Prize Award Ceremony in honour of Markus Brunnermeier
2007-06-15 : Expectations and credibility in modern central banking: A practitioner's view”